0.25(5x-1)+5(x-1=70.6
问题描述:
0.25(5x-1)+5(x-1=70.6
答
0.25(5x-1)+5(x-1)=70.6
两边同乘以4,得
5x-1+20x-20=282.4
25x=303.4
x=12.136